Fix platform detection

Author: petrochenkov

src/etc/check-sanitycheck.py

@@ -17,14 +17,12 @@
 
 STATUS = 0
 
-
 def error_unless_permitted(env_var, message):
     global STATUS
     if not os.getenv(env_var):
         sys.stderr.write(message)
         STATUS = 1
 
-
 def only_on(platforms):
     def decorator(func):
         @functools.wraps(func)
@@ -34,8 +32,7 @@ def inner():
         return inner
     return decorator
 
-
-@only_on(('linux', 'darwin', 'freebsd', 'openbsd'))
+@only_on(['linux', 'darwin', 'freebsd', 'openbsd'])
 def check_rlimit_core():
     import resource
     soft, hard = resource.getrlimit(resource.RLIMIT_CORE)
@@ -46,9 +43,9 @@ def check_rlimit_core():
 set ALLOW_NONZERO_RLIMIT_CORE to ignore this warning
 """ % (soft))
 
-@only_on(('windows'))
+@only_on(['win32'])
 def check_console_code_page():
-    if "65001" not in subprocess.check_output(['cmd', '/c', 'chcp']):
+    if '65001' not in subprocess.check_output(['cmd', '/c', 'chcp']):
         sys.stderr.write('Warning: the console output code page is not UTF-8, \
 some tests may fail. Use `cmd /c "chcp 65001"` to setup UTF-8 code page.\n')